Historical on-time performance
Denver to Williston
582 miData through Dec 2025Source: US DOT · BTS
Flights on DEN–XWA arrive on time 74% of the time over the last 12 months.
On-time rate74%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.8%of scheduled flights
based on 1,512 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- SkyWest AirlinesOn-time74%Medianon timep9045 minCancel0.8%Flights1,512
Why flights run late
Delay causes
- Airline32%
- Weather12%
- Air traffic (NAS)16%
- Late aircraft37%
- Security3%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly DEN → XWA
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 82% on time.
- Mornings82% on time · p90 25 min · 826 flights
- Overnights77% on time · p90 40 min · 1,069 flights
- Middays77% on time · p90 35 min · 1,573 flights
- Evenings71% on time · p90 55 min · 106 flights · limited
- Afternoons65% on time · p90 105 min · 205 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Tuesdays81% on time · p90 30 min · 547 flights
- Mondays78% on time · p90 35 min · 566 flights
- Saturdays78% on time · p90 35 min · 446 flights
- Fridays77% on time · p90 45 min · 559 flights
- Thursdays77% on time · p90 40 min · 552 flights
- Wednesdays77% on time · p90 35 min · 550 flights
- Sundays74% on time · p90 40 min · 559 flights
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